I run dual catch cans on mine. It doesn't give you the luxury of a poor baffle in the valve cover. It's simply a good place to catch oil snot and condensation. I wouldn't drain back into the crankcase as it's mostly water.
The factory doesn't do it this way for multiple reasons. It's NOT the best way. A pcv will pull a vacuum on the crankcase and pull impurities out. A breather system is simply a clean way to relieve pressure. You will need to change your oil more often without a PCV. Emissions also comes into play. Mine has worked great since day one.
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Todd
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